Dale - Computer Science Illuminated 61

Dale - Computer Science Illuminated 61 - 34 Chapter 2...

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Number A unit of an abstract mathematical system subject to the laws of arithmetic Natural number The number 0 and any number obtained by repeatedly adding 1 to it Negative number A value less than 0, with a sign opposite to its posi- tive counterpart Integer A natural number, a negative of a natural number, or zero Rational number An integer or the quotient of two integers (division by zero excluded) 34 Chapter 2 Binary Values and Number Systems Goals After studying this chapter, you should be able to: ± distinguish among categories of numbers. ± describe positional notation. ± convert numbers in other bases to base ten. ± convert base-ten numbers to numbers in other bases. ± describe the relationship between bases 2, 8, and 16. ± explain the importance to computing of bases that are powers of 2. 2.1 Number Categories Numbers come in all sorts of categories. There are natural numbers, nega- tive numbers, rational numbers, irrational numbers, and many others that are important in mathematics but not to the understanding of computing. Let’s review the relevant category definitions briefly.
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This note was uploaded on 01/13/2011 for the course CSE 1550 taught by Professor Marianakant during the Fall '10 term at York University.

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